"On June 22, 1936, the philosopher Moritz Schlick was on his way to deliver a lecture at the University of Vienna when Johann Nelböck, a deranged former studen

From the author of Wittgenstein's Poker and Would You Kill the Fat Man?, the story of an extraordinary group of philosophers during a dark chapter in Europe's h

A dazzling group biography of the early twentieth-century thinkers who transformed the way the world thought about math and science Inspired by Albert Einstein'

Most people feel it's wrong to kill the fat man.

On October 25, 1946, in a crowded room in Cambridge, England, the great twentieth-century philosophers Ludwig Wittgenstein and Karl Popper came face to face for